Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bf71ba05c9788f…

MALICIOUS

PDF

38.4 KB Created: 2020-11-09 04:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34159635e113bf19f0705f50ae933af5 SHA-1: 79a454b8f126c49e7e2d7754c92392e4fa372221 SHA-256: b5bf71ba05c9788f7fde1d9ce8414e92dd599120d919f16dcc00921e5060798a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://traffine.ru/123?keyword=meibomian+cyst+eye', is identified as a malicious redirector. The document body also contains this URL, suggesting an attempt to trick the user into visiting a malicious site. The presence of multiple links and the use of disposable hosting indicate a link farm tactic, likely for SEO manipulation or to distribute malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?keyword=meibomian+cyst+eye In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393486/normal_5fa87ae60e644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f95b4021f14f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wevixeda.files.wordpress.com/2020/11/70635537253.pdfIn PDF document text
    • https://dimatafol.files.wordpress.com/2020/11/lovuwanorajuminizosuji.pdfIn PDF document text
    • https://dukukowizak.files.wordpress.com/2020/11/givawekobotuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2dce5d-e799-4042-af4e-826305338250/43203270136.pdfIn PDF document text
    • https://supafewaseg.files.wordpress.com/2020/11/figos.pdfIn PDF document text
    • https://pupigebogom.files.wordpress.com/2020/11/mia_et_le_lion_blanc_streaming_complet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449f84ac-5b53-4bab-a05f-da90800f49d2/fakirozelofebas.pdfIn PDF document text
    • https://lovubigizimu.files.wordpress.com/2020/11/yojana_telugu_magazine_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f75ea82-38d3-4c99-a537-8809e5a72225/greek_theater_seating_terrace.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B47 5064 bytes
SHA-256: cc42beffa6cc4bd38a2f5d3166eb1be5e4497cb30f472322370a307e5bc9a3db
font_01_sfnt_off00006c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 9668 bytes
SHA-256: ce43c71570d36b83030fd416db3d55a95dfd48ddf8341735ae77fdd0f997ac0a